Tube-bending machine.



l @XN/humano R. TATTU. "'--TiBE BENDING MACHINE. APPLIGATION FILED11111.17. 1910.

986,'654 Patented 11a-12111911.

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R. TATTU.

TUBE BENDING MACHINE.

APPLICATION FILED JAN. 17, 1910.

Patented Mar. 14, 1911.

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=llllllllll' WLM/Woof@ RADU TATTU, OF NEW YORK, N. Y.

TUBE-BENDING MACHINE.

Specification of Letters Patent. Patented M ar, 14, 191 1.

Application led January 17, 1910. Seria1 No. 538,339.

To all whom 'it may concern:

Be it known that I, Rani: TAr'rU, a citizen of the United States,residing in the borough of Brooklyn, in the city of New York, county ofKings, and State of New York, have invented certain new and usefulImprovements in Tube-Bending Machines, of which the following is aspecification.

My invention relates to improvements in tube bending machines and theobject of my inventionis to provide a simple and eilicient device forbending tubes. I accomplish this object by the device illustrated in theaccompanying drawings, in which- Figure' 1 is an elevation of thedevice, Fig. 2 is a plan view of the same, Fig. 3 is a cross section ofthe device on the line www in Fig. 1, Fig. 4 is a view of the bendingWheel and clutch on the line g/-y in Fig. 2`, Fig. 5 is a view ofthe=core partly in section, and Fig. 6 is an end view of the same.

Similar characters refer to similar parts throughout the several views.

.Upon a frame 1 I provide a support 2 preferably extending from side toside of the frame near the base. Upon this support 2 I journal avertical axle 3 having a gear 4 thereon near its upper end, 'the saidgear having a hub 5 integral therewith eX- tending upwardly through thetable 6. A.

worm` gear 7 engaging the gear 4 is suitably supported by the frame 1.The shaft 8 ofthe worm gear 7 is provided with two driving pulleys 9 and10, one of 'said driving pulleys 9 serving to rotate the shaft 8 in onedirection, and the other driving pulley 10 ,serving to'rotate the shaft8 in the opposite direction, this being accomplished by means of acrossed belt and a clutch'in the usual manner.

On the upper side of the table 6 and set upon the upper end of the hub5,"I provide a circular grooved rotating member 11 upon the upper sideof which rotating 'member 11 I bolt a clamping member 12 extending'-out-` wardly from the rotating member 11 and provided with a downwardlybent end section 13v having a screw threaded aperture which receives thescrew bolt 14 which 'bears .against the plate 15'. Upon the' table 6 Ialso provide a core holder 16. Upon the table 6 I bolt a guide member 22provided I on its face with ball bearings 23 and having adjustin screws24, 24 whereby it may be set to tu es of variable size. IJ also providea plate 25 concave on its face to engage the tube to be operated uponand slidable upon the guide member 22.

The parts being thus assembled, the operation of my device isps follows:A core 17 upon the core holder lf3 is inserted in the tube to beoperated upon, and the said tube is passed between the plate 15, whichis preferably `grooved on its face to receive the tube, and the rotatingmember 11, the 'said tube being clamped against the rotating member l1by the bolt 14 in the downv wardly bent end section 13 of the clampingmember 12. belt upon the driving pulley 0 to the worm 7 which is. causedto rotate, therel'iy rotating the gear wheel 4 which it engages. Therotating member 11 upon the upper end of the hub 5 upon which the gear 4is Set is thus caused to rotate and the end of the tube'to be operatedupon is drawn around the rotating member 11, giving the tube the desiredbend. lThe plate 25 movingupon the guide member 22 with the tube servesto prevent the abrasion of the surface of the tube which is being bent.The core 17 within the tube will serve to prevent the collapse of thetube. When the tube has, in the manner indicated, received the desiredbend, power is transferred from the pulley 9 to the driving pulley 10'whereby the parts are restored to their normal condition, and, ifdesired, this may be again repeated and a further bend given to thetube.

lVhile I have shown my device operated by a belt on the driving pulleys9 and 10, it is obvious that the power may be applied by hand, or in anyother desired manner for either or both of said movements.

My improved core 17 comprises a rod .1S screw threaded at its outer endto receive the adjusting nut 19 and upon the other end of said rod Iprovide a split member conically apertured at its outer end to receivethe cone core 2O which is adjustably secured therein by the screwthreaded bolt 21. By means of the cone 2O the core may be enlarged orreduced -in diameter to meet the requirements of the tube to be operatedupon; the

cone being drawn into the core orhead by means of the bolt 21 toincrease the diam- `eter and withdrawn to reduce the diameter in theobvious manner.

Having 'thus described my invention, what I claim is:

1. In a tube bending machine, a table, a

Power is then applied by asol hub therein having its upper face flushWith the surface et the table and centrally apen tured to receive anaxle, an axle therein, a rotating mernbm above the table and Set uponthe hub, e bar upon the rotating member and having a doivllwardly bentend seetien and a plurality of bolts passed through the bar and therotating meniber and seated in the hub and axle' whereby the axle andhub are bound together subStantally as shown and described.

2. A table, a, rotatable centrally apertured hub tl'lei'eon, e gein.'upon the hub below the table, :1 vertical axle in 'the hub, a rotatablebetu'liug member above the table and set upon the hub, im' :l1-n1thereon, having a downwardly bent end section, eelampiug screw therein,a plate adapted to rest against e tube to be operated upon to engage theclamping Screw, a guide member upon the table; Vadjusting Screws thereinund seated in the table und a plate adapted to rest against the pipe tebe operated upon substantially as shown and deseribed.

In testimony whereof, I have signed my naine to this Specification inthe presenee of two subscribing Witnesses, this 29th da-y of December1909.

RADU TATTU; Witnesses:

JUSTIN S. GALLAND, ADELBERT W. BA1-LEY.

